Weaning from inotropic support and concomitant beta-blocker therapy in severely ill heart failure patients: take the time in order to improve prognosis

摘要

Beta-blockers improve the prognosis in heart failure (HF), but their introduction may seem impossible in patients dependent on inotropic support. However, many of these patients can be titrated on beta-blockers, but there is little evidence of successful clinical strategies.We analysed the records of inotropy-dependent patients referred for assessment for heart transplantation. Thirty-six patients (45%) could not be weaned (NW) and underwent left ventricular assist device (LVAD) implantation or transplantation, or died. However, 44 (55%) were successfully weaned (SW). Neither the aetiology (ischaemic vs. non-ischaemic) nor cardiac indexes were different in the, SW as compared with the NW group (2.27 ±0.5 vs. 2.15±0.6L/min/m2). The NW patients had lower LVEF ￡15 ±5% vs. 19 ±5%, P = 0.001), higher right atrial pressure (12 + 6 vs. 8±6 mmHg, P = 0.02), and more severe mitral regurgitation (P<0.001) than the SW patients. At discharge, 35 of 44 SW patients were receiving beta-blockers. In 29 of them, a beta-blocker could only be initiated or continued during concomitant support with i.v. enoximone for a duration of 14.1 ±7.2 days. Patients discharged on a beta-blocker had an LVAD/transplantation-free cumulative survival of 71 % during a follow-up of 2074 ± 201 days (confidence interval 1679-2470).It takes time to put severely ill HF patients on beta-blockers and it may require bridging with inotropes which are independent of beta-adrenergic receptors. Whether such a strategy may result in a better clinical outcome warrants further research.